本文關(guān)鍵詞：注塑機(jī)螺桿表面耐磨蝕涂層的制備及性能評價　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 激光熔覆 稀土CeO_2 涂層 耐磨性能 耐蝕性能

【摘要】：本文在38CrMoAl鋼基體表面利用激光熔覆技術(shù)制備了Ni35、Fe基、Co基和Ni60A合金熔覆層,利用磁控濺射技術(shù)制備了Ti-N鍍層與類石墨鍍層,利用離子氮化方法制備了滲氮層;研究了稀土CeO_2對Ni60A激光熔覆層組織與性能的影響;對各類涂層進(jìn)行耐磨性能與耐蝕性能表征與評價。結(jié)果表明:(1)制備的Ni60A、Fe基、Co基和Ni35熔覆層厚度均為1mm左右,微觀組織均為細(xì)小的枝晶,其中以Ni60A熔覆層的枝晶最為細(xì)小。Ni60A熔覆層的表層硬度(771HV0.1)最高,耐磨性能最好,磨損率為4.124×10~(-14)m~3/N.m;Fe基熔覆層、Co基熔覆層、Ni35熔覆層的耐磨性能依次降低。Ni60A熔覆層與Co基熔覆層的耐腐蝕性能最好,耐蝕性保護(hù)評級均為8。(2)稀土CeO_2能夠細(xì)化和凈化Ni60A熔覆層組織,并促使短棒狀碳化物M_(23)C_6(M=Fe,Ni,Cr)的生成;隨著稀土CeO_2含量的增加,熔覆層顯微硬度、耐磨性能與耐蝕性能均呈現(xiàn)先升后降的趨勢,至1%時,顯微硬度與耐磨性能達(dá)到最高值,硬度與磨損率分別為731.87HV0.1、3.057×10~(-14)m~3/N.m,與未添加稀土熔覆層相比,分別提高了31.34%和335%;添加量為0.5%和1%時,具有最好的耐腐蝕性能,耐蝕性保護(hù)評級均為5。(3)類石墨鍍層的耐磨性能最佳,磨損率為2.91×10~(-16)m~3/N.m,與其他涂層相比降低了2個數(shù)量級,Ti-N鍍層、Ni60A+1%CeO_2熔覆層與滲氮層耐磨性能依次降低;不同涂層的耐腐蝕性保護(hù)評級Rp分別為:滲氮層(Rp=2)、Ni60A+1%CeO_2熔覆層(Rp=8)、Ti-N鍍層(Rp=2)和類石墨鍍層(Rp=3)。(4)以磨損為主的注塑機(jī)螺桿選用類石墨鍍層,以腐蝕為主的注塑機(jī)螺桿選用激光熔覆Ni60A+1%CeO_2熔覆層。
[Abstract]:The synthesis of Ni35 in 38CrMoAl, using steel surface by laser cladding technology for Fe based, Co based and Ni60A alloy cladding layer, Ti-N coating and graphite coatings were prepared by magnetron sputtering technique, using ion nitriding method to prepare the nitrided layer; the effects of rare earth CeO_2 on Microstructure of laser cladding Ni60A with the performance of wear resistance and corrosion resistance; performance characterization and evaluation of various types of coatings. The results showed that: (1) the preparation of Ni60A, Fe based, Co based and Ni35 cladding layer thickness is about 1mm, the microstructure is fine dendrite with Ni60A cladding layer the dendrite the tiny.Ni60A cladding layer surface hardness (771HV0.1) the highest, the best wear resistance, the wear rate is 4.124 * 10~ (-14) m~3/N.m; Fe based cladding layer, Co based cladding layer, the wear resistance of Ni35 coating decreased.Ni60A Co based cladding layer and the corrosion resistance of the cladding layer can the best corrosion resistance protection rating Were 8. (2) of rare earth CeO_2 can refine and purify the microstructure of cladding layer is Ni60A, and the short rod-shaped carbide M_ (23) C_6 (M=Fe, Ni, Cr) generation; with the increase of the content of rare earth CeO_2, the microhardness of coating, wear resistance and corrosion resistance were first increased and then decreased trend the potential, to 1%, the hardness and wear performance reached the highest value, hardness and wear rate were 731.87HV0.1,3.057 * 10~ (-14) m~3/N.m, compared with the addition of rare earth cladding layer, were increased by 31.34% and 335%; the addition of 0.5% and 1%, with the best corrosion resistance, corrosion protection rating were 5. (3) class of graphite coating the best wear resistance, the wear rate is 2.91 * 10~ (-16) m~3/N.m, compared with other coatings decreased by 2 orders of magnitude, Ti-N coating, Ni60A+1%CeO_2 coating and nitriding layer wear resistance decreased; different coating corrosion protection rating of Rp were: nitriding layer (Rp= 2), Ni60A+1%CeO_2 cladding layer (Rp=8), Ti-N coating (Rp=2) and graphite like coating (Rp=3). (4) graphite like coating was chosen as the main injection molding machine screw, and the laser cladding Ni60A+1%CeO_2 cladding layer was selected as the main injection screw for corrosion.

【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ320.52;TG174.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 房永祥;齊麗君;王珂;王海林;朱長虹;朱廣志;朱曉;;純銅表面脈沖激光熔覆Ni60涂層的結(jié)構(gòu)與性能研究[J];激光技術(shù);2017年01期

2 王植;雷劍波;姜偉;孫亞娟;方艷;王云山;;激光熔覆Fe基TiC涂層的組織與性能[J];粉末冶金材料科學(xué)與工程;2016年01期

3 鄧德偉;孫晉華;王鑫林;張洪潮;;激光功率對激光熔覆鎳基合金涂層組織與性能的影響[J];稀有金屬;2016年01期

4 邱星武;;45鋼表面激光相變硬化改性組織及耐蝕性能[J];精密成形工程;2015年04期

5 楊曉倩;李亞江;馬群雙;王娟;;激光熔覆工藝研究現(xiàn)狀及發(fā)展[J];機(jī)械制造文摘(焊接分冊);2015年01期

6 王春濤;何小峰;;塑機(jī)螺桿高效滲氮工藝研究[J];浙江海洋學(xué)院學(xué)報(bào)(自然科學(xué)版);2014年06期

7 鄭英;王成磊;高原;張光耀;;鋁合金表面激光熔覆稀土CeO_2+Ni60組織及摩擦磨損性能[J];稀有金屬;2014年05期

8 林成虎;任靖日;賀春林;;激光原位碳化鉻-鎳基復(fù)合涂層的組織特征[J];激光技術(shù);2014年02期

9 馬平定;李玉軍;詹金磊;吳佳徽;;螺桿壓縮機(jī)激光熔覆修復(fù)技術(shù)研究與應(yīng)用[J];機(jī)械研究與應(yīng)用;2013年05期

10 蔡川雄;劉洪喜;張曉偉;王傳琦;蔣業(yè)華;;送粉角度對激光熔覆鐵基復(fù)合涂層形狀特征的影響[J];強(qiáng)激光與粒子束;2013年06期

相關(guān)博士學(xué)位論文 前1條

1 李偉;鈦合金表面B_4C/G激光合金化層的組織與耐磨性研究[D];山東大學(xué);2014年

相關(guān)碩士學(xué)位論文 前4條

1 周曉婷;CeO_2添加量對WC增強(qiáng)Ni基激光熔覆層組織和性能的影響[D];遼寧科技大學(xué);2015年

2 李澤邦;Ni基復(fù)合粉末激光熔覆層組織與性能的研究[D];山東大學(xué);2013年

3 姜超;激光熔覆Co基非晶復(fù)合涂層組織與性能研究[D];大連理工大學(xué);2012年

4 王世紅;磁控濺射制備氮化鈦及其復(fù)合薄膜材料的耐腐蝕性研究[D];中國石油大學(xué);2008年

，

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